.badge-muted { color: var(--slate-500); background: var(--slate-100); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; color: var(--slate-500); font-size: 14px; }
.breadcrumbs a { color: var(--brand-700); font-weight: 700; }
.subject-grid { display: grid; grid-template-columns: minmax(0, 720px); }
.course-card { display: grid; gap: 18px; }
.subject-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 15px; color: white; background: var(--brand-700); font-size: 22px; font-weight: 850; }
.attention-card { border-left: 4px solid var(--accent-500); }
.attention-card h3 { margin-top: 12px; }
.task-reason { max-width: 690px; margin-top: 8px !important; color: var(--slate-700) !important; }
.due-date { display: block; margin-top: 12px; color: var(--warning); font-size: 13px; }
.feedback-mark { margin: 10px 0; color: var(--brand-900); font-size: 28px; font-weight: 850; }
.upcoming-row { box-shadow: none; background: var(--slate-50); }
.upcoming-row h3 { margin: 12px 0 4px; }
.timeline { margin: 0; padding: 0; list-style: none; border: 1px solid var(--slate-200); border-radius: var(--radius-md); background: white; box-shadow: var(--shadow-card); overflow: hidden; }
.timeline-item { position: relative; display: grid; grid-template-columns: 42px minmax(0, 1fr) auto; align-items: center; gap: 14px; min-height: 88px; padding: 18px 22px; }
.timeline-item + .timeline-item { border-top: 1px solid var(--slate-200); }
.timeline-item h3 { margin: 2px 0 0; }
.timeline-marker { display: grid; place-items: center; width: 34px; height: 34px; border: 2px solid currentColor; border-radius: 50%; font-weight: 900; }
.timeline-success { color: var(--success); }
.timeline-warning { color: var(--warning); background: var(--warning-bg); }
.timeline-info { color: var(--info); background: var(--info-bg); }
.timeline-muted { color: var(--slate-500); }
.lesson-number { color: var(--slate-500); font-size: 12px; font-weight: 750; text-transform: uppercase; letter-spacing: .05em; }
.lesson-hero { margin-bottom: 24px; border-radius: var(--radius-lg); padding: clamp(26px, 5vw, 42px); color: white; background: linear-gradient(125deg, var(--brand-900), var(--brand-700)); }
.lesson-hero h1 { margin: 16px 0 8px; color: white; }
.lesson-hero .eyebrow { margin-top: 20px; color: var(--brand-300); }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; align-items: start; gap: 22px; }
.lesson-content { padding: clamp(24px, 5vw, 42px); }
.lesson-content h2:not(:first-child) { margin-top: 34px; }
.lesson-content p { color: var(--slate-700); line-height: 1.75; }
.learning-example { margin: 24px 0; border-left: 4px solid var(--accent-500); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 20px; background: var(--accent-100); }
.learning-example span { display: block; color: var(--accent-700); font-size: 12px; font-weight: 850; text-transform: uppercase; letter-spacing: .06em; }
.learning-example strong { display: block; margin: 8px 0; color: var(--brand-900); font-size: 19px; }
.lesson-aside { position: sticky; top: 24px; }
.lesson-aside .btn { width: 100%; margin: 18px 0 10px; }
.step-list { display: grid; gap: 14px; padding-left: 22px; color: var(--slate-700); }
.step-list .done { color: var(--success); text-decoration: line-through; }
.attention-explainer { display: grid; gap: 6px; border: 1px solid var(--brand-300); border-radius: var(--radius-md); padding: 20px 22px; color: var(--brand-900); background: var(--brand-50); }
.empty-state { padding: 34px; text-align: center; box-shadow: none; }
.empty-state h2, .empty-state h3 { margin-bottom: 8px; }
.empty-state p { margin: 0; color: var(--slate-500); }
.feedback-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: start; gap: 24px; }
.feedback-card h2 { margin-top: 16px; }
.feedback-score { min-width: 130px; border-radius: var(--radius-sm); padding: 16px; text-align: center; background: var(--brand-50); }
.feedback-score span { display: block; color: var(--slate-500); font-size: 12px; }
.feedback-score strong { display: block; margin-top: 4px; color: var(--brand-900); font-size: 28px; }
.feedback-card blockquote { grid-column: 1 / -1; margin: 0; border-left: 4px solid var(--success); padding: 16px 20px; color: var(--slate-700); background: var(--success-bg); line-height: 1.65; }
.feedback-card .btn { width: fit-content; }
@media (max-width: 760px) {
  .timeline-item { grid-template-columns: 38px minmax(0, 1fr); padding: 16px; }
  .timeline-item .badge { grid-column: 2; }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-aside { position: static; }
  .feedback-card { grid-template-columns: 1fr; }
  .feedback-score { text-align: left; }
}
@media (max-width: 520px) {
  .attention-card { grid-template-columns: 1fr; }
  .attention-card .btn { width: 100%; }
  .position-row { align-items: flex-start; flex-direction: column; }
}

.student-resources { scroll-margin-top: 20px; border: 1px solid var(--brand-300); border-radius: var(--radius-lg); padding: clamp(22px, 4vw, 30px); background: linear-gradient(145deg, white, var(--brand-50)); box-shadow: var(--shadow-card); }
.student-resources-intro { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; margin-bottom: 18px; }
.student-resources-intro h2 { margin-bottom: 6px; }
.student-resources-intro p:not(.eyebrow) { margin: 0; color: var(--slate-500); }
.student-resource-grid { display: grid; gap: 12px; }
.student-resource-card { display: grid; grid-template-columns: 48px minmax(0, 1fr) auto; align-items: center; gap: 15px; box-shadow: none; }
.student-resource-icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; color: white; background: var(--brand-700); font-size: 19px; font-weight: 900; }
.student-resource-copy h3 { margin: 4px 0; }
.student-resource-copy p { margin: 4px 0 8px; color: var(--slate-700); line-height: 1.5; }
.resource-kind { color: var(--brand-700); font-size: 12px; font-weight: 850; letter-spacing: .05em; text-transform: uppercase; }
.student-resource-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--slate-500); font-size: 12px; }
.student-resource-meta span + span::before { content: "·"; margin-right: 18px; }
.lesson-resource-link { display: flex; gap: 10px; align-items: center; margin-top: 18px; border: 1px solid var(--brand-300); border-radius: 12px; padding: 12px; color: var(--brand-900); background: var(--brand-50); text-decoration: none; }
.lesson-resource-link > span:first-child { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; color: white; background: var(--brand-700); font-weight: 900; }
.lesson-resource-link strong, .lesson-resource-link small { display: block; }
.lesson-resource-link small { margin-top: 2px; color: var(--slate-500); }
.preview-resource-empty { display: flex; justify-content: space-between; gap: 20px; align-items: center; border-style: dashed; box-shadow: none; }
.preview-resource-empty h2 { margin-bottom: 5px; }
.preview-resource-empty p { margin: 0; }
@media (max-width: 700px) { .student-resources-intro { flex-direction: column; gap: 10px; } .student-resource-card { grid-template-columns: 44px minmax(0, 1fr); } .student-resource-card .btn { grid-column: 1 / -1; width: 100%; } .preview-resource-empty { align-items: stretch; flex-direction: column; } }